Loraeus
Loraeus was an Ultramarines Scout, when his hidden psyker powers suddenly manifested themselves in battle with Orks and destroyed a group of the Xenos. In the aftermath of the battle, he was separated from his fellow Scouts and met with the Chapter's Chief Librarian Tigurius, who explained to Loraeus he was to begin training to become a Librarian. For the rest of that day though, Tigurius told Loraeus that he was to return a pile of texts within the Librarium to their proper place. Tigurius then left and Loraeus began his chore without incident until he read a line of words from one of the texts. This suddenly caused a group of Nurglings to appear within the Librarium and its door refused to open when Loraeus tried to leave to get help. As more of the Daemons began to appear Loraeus attacked them, but for everyone he destroyed another took its place. He quickly realized he was getting nowhere fighting the Daemons and remembered this all began with the words he read from the text. Acting quickly Loraeus used his psyker powers to completely destroy the text, which caused the Daemons to disappear. He then suddenly heard someone clapping and turned around to find that Tigurius had been watching him the entire time. He told Loraeus that the Daemons had been a secret test against his character and in fact were just an illusion cast by another Librarian, who was aiding Tigurius. The Chief Librarian then congratulated Loraeus, in passing the test and said he was ready to begin his training as a Lexicanium.[1]